One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10)(11,16)(12,15)(13,14)(17,18,20,22)(19,23,24,21)(26,27)(28,32)(2,5)(6,8)(9,11,14,12)(10,15,13,16)(25,26,29,27)(28,31,32,30)(11,12)(15,16)(17,19,20,24)(18,21,22,23)(25,26,29,27)(28,30,32,31)(1,2)(3,6)(4,5)(7,8)(9,12,14,11)(10,15,13,16)(17,19)(18,21)(20,24)(22,23)(25,27,29,26)(28,31,32,30)(1,3)(2,6)(4,7)(5,8)(9,13,14,10)(11,15,12,16)(17,18)(19,21)(20,22)(23,24)(25,28,29,32)(26,30,27,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.